Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76648cb6559ea8a5a06b5832d2167ed935349ec6c7e89897a778ed7cb424cb1a' 
  AND token = 'emqsLbXfJui4A56MxUWKpzYjKgIBEZNDgEJTjST0tyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}